Siemens AX72 Service Manual

Release 1.1
Technical Documentation
01/2006
TD_Repair_L1-L3_AX72_R1.1.pdf Page 39 of 41
17 LED_Keypad illumination Problems
Fault Symptoms
Customer: GRT:
Main keypad illumination does not work Current measured failed
LED Problems
Watch for oxidation and
damaged pads of the
LED’s
caused by customer
SCRAP - has to be send
separately to WSC
okay
Check the status of the
LED’s visually
Use the diode test
function of a multimete
r
to check the status of
the diode. The typical
voltage drop on the
diode is 1.7 V when
testing the diode
function with the
multimeter.
Exchange
keypad LED’s
Continue with
higher repair level
okay
not
oka
y
not
oka
y
- check for twisted or
bent contacts
- check for dry joints
Back to customer
without repair
LED_ KEYPAD
Remove metal dome sheet before replace LED’s Use soldering iron to remove defective component. Avoid
excessive heat! Watch surrounding components! Resolder new component afterwards. The metal dome jip
must be used to place the metal dome sheet.
E-commerce order number: L36840-L2056-D670
E-commerce order name: LED AMBER
Soldering temperature: ~ 360°C Tip Temp.
IRIS Diagnose Code: 22000 Display / Background Illumination
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2006©BenQ

Siemens AX72 Specifications

General

Brand	Siemens
Model	AX72
Category	Cell Phone
Language	English